That, sadly, sums it up.
We train to be better prepared for the situations we can change, but that certainly doesn't provide any guarantees. No matter how well trained you are, and no matter how great your situational awareness is, there's always the possibility that something's just going to blind side you.
We've all watched the movies and we like to think of ourselves as the hero protagonist, but sometimes the cards are just against you.

But there's no sense worrying about it. The odds of being in a violent conflict are low, and the odds of being in a violent conflict where you have no control over the outcome are even lower.

As the saying goes "God, grant me the strength to change the things I can, the courage to accept the things I can't, and wisdom to know the difference."

If you try to control every possible risk you'll wind up in a basement wearing a tinfoil hat.